Unpolarised light is incident from air on a plane surface of a material of refractive index $μ$ . At a particular angle of incidence i, it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?

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$i = \sin^{- 1} (\frac{1}{μ})$

Reflected light is polarised with its electric vector perpendicular to the plane of incidence

Reflected light is polarised with its electric vector parallel to the plane of incidence

$i = \tan^{- 1} (\frac{1}{μ})$

answer is B.

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Detailed Solution

In polarisation by refl ection, refl ected light is completely polarised and refracted light is partially polarised.
The reflected light contains only dot components. Arrow components perpendicular to plane of incidence are
polarised.

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